Rated X, I don't know if the Deluxe Prime or Voyager Megatron will be coming out from Hasbro US. Megatron's unlikely, unless they radically alter his colour scheme. So I'm guessing no on that one. Prime's a possibility, but most people will tell you not to bother with it and hunt down the Voyager version either from Classics or Henkei. Personally, I quite liked him, for robot mode, anyway.
assembling a Neo-G1/TF:TM cast. Please PM if you have (or know of) the following at a reasonable price: Classics or Henkei Prowl, Astrotrain, Ramjet, Skywarp, Sunstreaker, Sideswipe, Blurr, Perceptor, GDO Wheelie and Springer, or 3rd Party Motobot Arcee, FP Springer, iGear Ratchet and Ironhide, City Commander (and/or Ultra Magnus), Starscream (deluxe) Coronation add-on, or Spike and Daniel in their Exo-Suits.