Well the G1 Pretenders were erm, coffins, so to speak.
The concept that Hastak took now is making the shell THE transforming robot mode itself - e.g. Thunderwing, Bludgeon. Taking a cue from that, and making it so that it's a shell but there's a innerbot (transforming) inside that transforms - this will end up in the same concept as that of G1 Mega pretenders- both shell and innerbot transforms and combines. With today technology it would be indeed awesome and doable to give the Shell articulation. Albeit, costs wise I don't believe HAstak will approve 
.
If I wanted figures to be given a newer version articulated shells and revive the Pretender line it would be ( and Budget is not a constraint)
A) The Decepticon Pretender monsters (Monstructor) - these little buggers would have interesting monstershells which if did have articulation and prolly of larger size class would be awesome . I admit a bit of nostalgia in my decision with these ones - plus I wanted a better articulated version of the innerbots themselves - even if they end up Legion class - Im sure they can make it with better articulation since they were able to make so with minicons. Added bonus would be if the innerbots still combines to Monstructor - but yeah that's reaching for the stars.
B) Those old G1 original Actionmaster characters only - e.g. Rad, RolloutMainframe, Take-Off, Powerflash, Jackpot.
Same as the G1 explanation would be that they lost their ability to transform - or mebbe their "T-Cog" got damaged beyond repair, hence they got suited up instead in "Transforming Armour" that doubles as their transport weapons vehicle altmode. But this time the suits are articulated, and transforms. Kinda like the late Actionmasters - e.g. Rumbler, Circuit, but instead of that limited armour and car transformation of their Vehicles. It's their pretender shell. A bonus is that they come still with Targetmaster partners (minicons if you will
)
C) Throttlebots - these bumperbattlers need an extra "bonus" to make em more appealing really. Not that I dont find the original appealing as I have two sets
of em, but yeah an articulated, transforming outershell coupled with a Fast transforming freewheeling innerbot ( give them articulation too). I'd buy that. It would interesting to see what kind of theme they would come with for the shells too - as with the G1, the shells came in themes for their look.
D) If there was one Pretender that I wanted to also get a newer , modern treatment - it would be Bomb-Burst - That hoverplane innerbot altmode is baaad IMO. If they can make a more sleek looking version and couple it with a great mean-looking Bat monster shell that has articulation and transforms, whoa!!!
Wanted AM partner Vanguard, Myclones Dirge, G1 Victory Leo, e-hobby Dark scream ( the black version), e-hobby Magnificus
Parts- AM partner Basher-side guns, G1 Actionmaster Elite Windmill's blades[I][B]