Okay, so here's how thread works -- choose any existing Masterpiece toy(s) and think of how you'd repaint it if it were to be released as a limited exclusive (so we can get away with very 'high level' fanboyish stuff that wouldn't be viable for a regular mass production figure ). Also try to see this from HasTak's perspective, i.e. how would you repaint these toys if you were working for HasTak and wanted to maximise profits for them (even if it might irritate some fans ).

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+ Masterpiece Soundwave in purple like the G1 Marvel US comics
Includes exclusive MP Ratbat toy.

+ Masterpiece Cassette Pack:
Laserbeak/Buzzsaw mould repainted as Garboil and Sundor
Ravage repainted as Howlback and Glit
Rumble/Frenzy repainted as Enemy

+ Masterpiece Blizzard Storm:
New MP Seeker mould repainted in electric blue with white highlights as the blue Rainmaker.

+ Masterpiece Deep Cover:
Repaint of MP Lambor

+ Masterpiece Clampdown:
Repaint of MP Alert

+ Masterpiece "Dinobot Rescue Convoy":
MP10 Convoy repainted in the colours of Diaclone Powered Convoy's cab-robot, and marketed as represented the way Optimus Prime was coloured in S.O.S. Dinobots
Comes with exclusive Sparkplug figure.

+ Masterpiece "Matrix Death Optimus Prime" (Hasbro only)
New MP Optimus Prime entirely in greys and black, as he appeared when he bought the Energon Farm in Transformers The Movie. I'm suggesting it as a Hasbro only toy, since TakTOM already has Sleep Mode Convoy and Black Convoy, it might not work for their market.
Comes with exclusive Adult Spike and Daniel Witwicky figures (in jumpsuits)

+ Hate Plague MP Rodimus Convoy/Prime
Yeah, it'd mostly be glittery red. Comes with Spike and Daniel figurines (in exo-suits)

+ Generation 2 MP Grimlock
He's blue! Right shoulder has "BIG GRIM" tampographed on it and comes with a white bandana (which works well since MP Grimlock's robot head is designed to have a brain scanner or crown clip on it, just design a bandana to attach similarly).
http://s90690880.onlinehome.us/jhiax...es/grimban.jpg

+ MP Black Megatron
These colours with this persona/story. Comes with a green Kremzeek and pink flail.

+ MP Megaplex
Same colours as eHobby Megaplex. Comes with a pink Kremzeek and yellow flail.