I would be very surprised, shocked if we see Riker or the Titan in this film.
As I've stated before even should this movie begin in the 24th Century (I am at least fairly sure we'll catch a glimpse) chances are, it as well has been radically altered to conform to the design expectations of the new production team.
Sharr
Agreed... the Titan (which as far as I'm concerned needs to stay as Sean's design), is just fine for what it's supposed to be. But nobody but us "hardcore fans" would even know what it is, and many of US won't care.
If we see ANYTHING of Starfleet in the "Old Spock" timeframe (and let's be honest... we don't know if it's just post-TNG or later... maybe MUCH later), I expect that it'll be minimal and only there if it's necessary to further the storyline. There's a TON of storytelling to be done in the main "past"... and most anything that would involve the "present" (from Nimoy's Spock's perspective) would have to be about getting this story moving... not just to be "cool for fans."
SO... let's assume that Nero and Co. are Romulans... which seems VERY likely based upon a recent interview we've seen. Further, let's assume that this isn't a faction of the Romulan government (which also seems very likely unless we're talking massive "revisionist history" stuff going on here which'll confuse anyone who's ever watched any of the latter-day Trek stuff). The most we'd see would be:
1) Nero and his cohorts get the idea to go time-traveling.
2) Spock goes chasing after them.
Alternatively, I'd still rather see something more along the lines of Spock telling a morality tale about how a young friend of his, James Kirk, went from being a "bad boy" to being a "living legend."
Maybe the two will both be present... but there are now a few bits of evidence that tend to lean more towards the first option (ie, "time travel") and that alone. Oh well... (sigh)