To keep this away from the unfortunate targeting of another similar thread, I will keep this simple and brief.

The developers plan to allow our actions to dynamically and continuously maintain and alter our alignments at this time. This plan may or may not change in the future, we the players do not yet know.

As such, there will obviously be intermingling during basic gameplay of heroic and villainous characters. What I would like to propose is a way for everyone to get maximum enjoyment out of a zone event like the Steel Canyon Fire event.

For starters, each event gets three phase versions. Helpers, burners, and PvP. Players entering the phase perimeter get two popups in sequence.

First: Will you help save the building or help destroy it?
Second: PvE or PvP?

Players who choose to help save the building but not fight other players, regardless of current alignment, are all placed on the same team in the Helper phase. Players who choose to do the opposite but still don't want to fight other players are all placed on the same team in the Burner phase. These PvE phases use generic thugs and lackeys or NPC heroes as enemies as appropriate.

The third phase would place all helpers on one team and all burners on another team and be one big PvP fight to see what happens to the building.

I believe that this would be feasible to accomplish in due time even if it is not available at launch. If such a split is indeed impossible, at least have the fire event as a possible PvP scenario in an arena match or something if it is determined to be in the best interest of the game to not mingle PvP with PvE.