I don’t think it’s very likely that sekaiproject will get such a deal soon, though it would be great. As Visual Art’s said, whether other games get localized depends on Clannad. It’s still too early to say yet.
I do hope that others aren’t getting discouraged because of the possibility of an official localization though. Sekaiproject has used fan translations as a base for their works before. I would think that some translators (not all) would be more interested because of the possibility of getting recognition on a Key VN (and maybe pocket a few coins).