I do not know yet, Cerberus cruiser will be there for sure, but I'm not sure about ME3 Dreadnought, if I manage to find it in ME3, I'll most definitely port it ;)
Final touches to do before I sent all the ships that are ready to beta testers and there's the list of ships that are working ingame (just need to work on harpoints for a little bit longer ;)
Alliance fleet :
Fighter
Cruiser
Battlecruiser (Cerberus cruiser with Alliance colors)
Dreadnought (ME1 version retextured to fit ME3 style)
Collector's cruiser
Asari Dreadnought - Destiny Ascension
and here's scale chart of all those ships