Yes, it is.
Map-wise, the most that needs to be done is putting DP tiles over everything, putting together bases of Team Nova, and maybe making Sevii Islands 8 and 9 actual locations.
Yeah, there's a trilogy. It begins with Team Aero's rise in Genisoh region in Azure. In the years that follow, Team Galactic pushes them out. AeroGreen tells of Team Aero's merger with the International Police to become Team Nova and take out Team Rocket's presence. Meanwhile, again in Genisoh, a lone trainer(the player)is finally able to challenge Team Galactic's authority. Towards the end of GalacticBlack, an elite squad of Aeros return from Kanto to help the player end Team Galactic's rule for good.