Hmmm, I partly like the idea... Espeiclaly after seeing Storm Shadow, Snake Eyes, and Firefly, but part of me longs for Hasbro to simply improve the 3.75" line to the point where there's realistic sculpt proportions, increased articulation (wrists, boot tops, and maybe a mid-thigh swivel would be a huge start), and increase the use of features like working holsters and sheaths on the characters.
I'd like the line to stay 3.75" I guess since that's become it's hot scale I think. 12" is so-so... Especially with their competition.
If the Marvel Legends style ones were less "outrageous" in their sculpt though, and more realistic, I'd maybe change my mind on those then actually. Seeing as how vehicles are not Joe's focus anymore, maybe it'd be a good idea?
Since you brought this up, I figured I'd make mention on something I read at GH.com forums the other day.
J&R Productions, which is a company that's been casting and reproducing heads, gear, and such for G.I. Joe in 3.75" scale have been SHUT DOWN by Hasbro legal teams.
The owner's trying to work something out currently with Hasbro.
It's a shame because the owner is just trying to give those who enjoy a certain aspect of the hobby (customizers) an outlet that they don't get from Hasbro... MisterPL makes strong arguments for why it's right of Hasbro to enforce their trademarks, and nobody can argue it's their property to do with as they see fit, but I think in the end it will only serve to hurt them (however minor) as a profitable business, and in the eyes of the consumers who support their product wholeheartedly.
In this day and age of fighting for every sale in the aisles and on the net, I think Hasbro should weigh carefully their decision to let J&R productions continue. They may just be "cutting off their trademarked nose to spite their face", as it were.
In the end I think they'll deem the situation not worth bothering with to any great extent, and they'll simply tell J&R "no" to everything and one more source to help customizers will go the way of the do-do, unless he does things on the QT.