Top Row:
Bloodhawk (aka Lemuel Krug, member of X-Men 2099), Xi'an Chi Xan (leader/founder/member of X-Men 2099), and Punisher 2099 (Jake Gallows).
Middle Row:
Spider-Man 2099 (Miguel O'Hara), Venom 2099 (Kron Stone), Doom 2099 (really Dr. Victor Von Doom?), Skullfire (Timothy Fitzgerald, second-in-command/member of X-Men 2099), Hulk 2099 (John Eisenhart), and below that, Ravage 2099 (Paul Philip Ravage).
Bottom Row:
Tyler Stone (chief villian in the Spider-Man 2099 series, head of R&D at Alchemax), Galahad 2099 (Ethan Shields, closest thing to an Iron Man 2099), Ghost Rider 2099 (Kenshiro "Zero" Cochrane), and Herod (possibly the greatest villian of the original 2099 stories).
Marvel wikia links to each character (with other links):
http://marvel.wikia.com/Lemuel_Krug_(Earth-928)
http://marvel.wikia.com/Xi%27an_Chi_Xan_(Earth-928)
http://marvel.wikia.com/Jacob_Gallows_(Earth-928)
http://marvel.wikia.com/Miguel_O%27Hara_(Earth-928)
http://marvel.wikia.com/Kron_Stone_(Earth-928) (Don't know why he's said to also be Scorpion 2099, that wasn't part of Earth-928 continuity)
http://marvel.wikia.com/Victor_von_Doom_(Earth-928)
http://marvel.wikia.com/Timothy_Fitzgerald_(Earth-928)
http://marvel.wikia.com/John_Eisenhart_(Earth-928) (also:
http://www.leaderslair.com/gammapeople/hulk2099.html)
http://marvel.wikia.com/Paul-Philip_Ravage_(Earth-928)
http://marvel.wikia.com/Tyler_Stone_(Earth-928) (also:
http://static.comicvine.com/uploads/scale_small/10/101073/2097292-sp.png and
http://i.kinja-img.com/gawker-media/image/upload/18dybxrm3n3a6jpg.jpg)
http://marvel.wikia.com/Ethan_Shields_(Earth-928) (also:
http://www.marvunapp.com/Appendix/gala2099.htm and
http://www.comicvine.com/galahad/4005-80923/)
http://marvel.wikia.com/Kenshiro_Cochrane_(Earth-928) (also:
http://www.marvunapp.com/Appendix3/ghostrider20997.jpg and
http://www.marvunapp.com/Appendix3/ghostrider20993.jpg)
http://marvel.wikia.com/John_Herod_(Earth-928) (also:
http://www.doom2099.com/profiles/herod.html and
http://static.comicvine.com/uploads/scale_small/10/101073/2098088-sp.png)
And as Master Mold stated below in the first thread about this collage, he created the Galahad 2099 and Herod mugen-sprites.
