WOW!!! That Devastator is fracking awesome!! About how much is that one or the TFC going to run?
The first TFC Constructicon ( Scavenger ) has been going for round about the $100 mark.....it's just over 6 inches tall in robot mode and the fully combined Devastator is expected to be around the 12 inch mark, possibly a bit bigger depending what speculation you believe.
No design sketches or images of TFC's Bonecrusher or Mixmaster have been shown yet which has lead to a lot of silly scaremongering about whether they'll even be released.
There aren't any prices yet for the MakeToys one but as the Constructicons will be much smaller ( the Bruticus it's stood next to is made up of Scout Class robots ) it will probably be cheaper.
As far as Shockwave goes a company is making a toy based on the steampunk design used in the "Hearts of Steel" comic series,
https://transformers.wikia.com/wiki/Hearts_of_Steel_issue_1
It's not G1 Shocky but still a pretty awesome looking design.
Given the cartoon based aesthetic of the recent iGear products that have been announced I wouldn't be at all suprised to see them do a G1 style Shockwave at some point so if the steampunk one isn't your thing there's a fair chance a cartoon style version will be just over the horizon.