Finally an update on TMCC!
This month’s MCC development update covers Forge content imports, Reach’s Forge and Theater status, an E3 recap, more info on the new progression system, community Q&A, some 4k footage, and more!
www.halowaypoint.com
They talk about Reach and how they will do a one-time transfer of game type and maps that people have made and uploaded to file share. That way you don't lose your creations when playing on TMCC. This includes content created in halo 3, 4, and Reach. Screenshots, films and game clips not going to be transferred.
They go into detail about the new upcoming TMCC progression system, which involves seasons and ranks. These seasons apparently will happen for not just Reach but for all the TMCC games and when you play you earn points to unlock Reach and from the sounds of it, maybe new content for the other games too? They specifically mention using point for Halo CE content, whatever that might be.
Theater mode and forge will be available to console users day one, but PC players will have to wait a little longer.
PC Reach in 4K: