I'm very new to this community so I fully expect to get told to "STFU" about this topic as I've not actually been involved in the community and I have not got a character that I have dedicated so much time and love into. Still, after having read through this thread, the lore and the many character backgrounds, journals and stories here I do feel I need to say something.
The idea of a complete reboot is both a little disturbing and very exciting as a prospective member of this RP community. While I won't be having to integrate myself with the long-standing factions and daily struggles of the current universe, I will instead be part of something new where my actions and the interaction with others will have a much more profound impact upon the world as a whole. That's scary, exciting, intimidating and inspiring.
All the debate about the time in which the DayZRP SA universe will begin in is deeply encouraging. People who didn't care about the community they were part of and the universe they were involved with wouldn't debate this heatedly (both for and against it) about the matter.
From what I've read, there's three positions for timeline currently in people's minds (and yes, I am ripping off the "28" series of films here, they are some of my favourite zombie apocalypse films of all time).
The "Day Zero" setting, where the apocalypse has really only just begun.
The "28 Days Later" setting, where there are already small pockets of survivors starting to form but the fear is ever present and ingrained into every decision and reaction.
The "28 Months Later" setting, where major powers have really begun to form and while the zombie menace is still a real and present danger the survivors have begun to find ways and means of surviving and even thriving.
Now, as several people here have pointed out, the world of Chernarus has enough decay and damage that the "Day Zero" option is a bit of a stretch. Particularly as unless NPC civilians are added to be the "idiots who get themselves killed in the first 20 minutes of the zombie film", we're going be light on warm bodies and heavy on zombies. Survivors would literally be still reeling from the shock of the situation and the loss of friends, family, co-workers and loved ones.
The "28 Days Later" scenario, as Tomeran and others have pointed out, has the potential to have all the "early days of survival" fear, betrayal, barely surviving, onset of malnutrition, etc. The level of decay and destruction in the towns and cities is within reason, particularly as the military has been involved in some pretty heavy conflict during the initial week if we roughly apply the lore which Tomeran has laid out in the lore thread.
This scenario also has the potential for groups to be pre-formed, at first glance I can see several immediate group types which could be used for people who want to start off together and have sufficient RP potential that the advantage of starting in a group can be offset through clever and well thought-out character back stories.
Remnants of local law enforcement.
Remnants of Chernarus military.
Remnants of Russian special forces.
Remnants of NATO forces.
Local street gangs.
Survivors from small communities in villages and towns who managed to cling on by the skin of their teeth.
Again, using the pre-existing lore we know that the military forces have been heavily decimated by the apocalypse and it's almost certain the local command structure has begun to disintegrate. This means that surviving units would most likely be functioning under whoever the highest rank would be, this could be anything from captains to corporals. There's plenty of scope for the military groups to fragment with some becoming well armed, well trained bandit groups, some trying to help protect whatever survivors they can gather, some just trying to desperately get home to their families!
The same can be construed from local law enforcement, if you fold in some corruption in certain areas of the law enforcement then even more scope opens up for some rather unpleasant but interesting characters to roleplay as.
Local street gangs would probably be one of the big sources of bandit factions, particularly those in and around the cities and while they lack the formal training of LEOs and soldiers, they have the inherent low cunning and survival instincts that many street hoods would develop. This lends itself towards a more brutal, tribalistic grouping. Of course, it's entirely possible that said street gangs may step up and work to protect their community against the zombie menace, but this I think is a rather idealistic view.
And finally I come to the "small and battered communities of survivors" who will do whatever it takes to keep themselves and each-other safe. I can see quite a bit of potential for internal friction and politics here, something for a larger group who want a more emotive and drama-filled group perhaps?
Most, if not all, of the above points for the "28 Days Later" scenario hold true for the "28 Months Later" scenario. This scenario is where larger groups have begun to form, smaller bandit and survivor groups have either been wiped out or absorbed into other groups and much of the initial formation of the game's lore has been set in place. Now it's the time of the major story arcs and the smaller stories that play out inside and between factions. Border skirmishes, zombie herds, large scale banditry and communities really beginning to thrive in the apocalypse.
Phew! *wipes forehead* That came out substantially longer than I anticipated!
My personal viewpoint is that the "28 Months Later" scenario requires a much more matured version of SA and dropping the whole community into such a setting, while certainly good initially, may prove to be restrictive in the long-term. Starting with a "28 Days Later" scenario in which survival is still critical and survivor groups are mostly nomadic lends itself not only to the current state of SA but also allows the "28 Months Later" scenario to be formed naturally over time, creating a more organic experience.
That concludes my two pennies, I won't be placing a vote in the poll as I really haven't got the right to vote on this topic. If you have read this entire wall of diatribe then congratulations and commiserations, have a free shot of vodka on me.
Edit: Small grammar correction.