Let's look at the LTE phones on Verizon:
Bionic - Shoe in for sure, even if it flopped, which it didn't.
Thunderbolt - Still a huge seller and will get the update solely because of that.
Revolution - Still selling well, will most likely get it as long as LG hasn't thrown the towel in on it and opted for new device built with ICS in mind.
Charge - Selling really well still, will most likely get it.
Breakout - There's a lot of technical hurdles on this one and VZW may opt out of an update for this.
Stratosphere - It's essentially the Charge with a keyboard, it's brand new to VZW, and it it's the only LTE slider, it would surprise me if it didn't get the update shortly after the Charge, if the Charge gets it. In fact, I bet all original Galaxy S phones get it just because Samsung has been intent on keeping the original line alive, and they worked so closely with Google on the GN and ICS they already have a shoe in the door for this.
All in all I'd say the whole line up of LTE phones at Verizon will get it, except the Breakout. The app space on that phone might not stand up to all of ICS's in-built apps plus the VZW patented bloat.
That or none of the phones get it because Google added a feature to disable/remove carrier apps you don't want and we all know VZW loves it's crapware more than customer requests and demands as well as a major software update from the OS their top selling phones use.
On top of that it's gonna be a while as hardware vendors have to rethink and retool their custom UI's for this game changing update which, of course, makes me a sad panda. If we see it it'll likely be after June 2012 thanks to that.