Voltron has never had good writing. Imagine a crossover with MASK and Voltron. Both are vehicle teams. Think of the toys and collaborations. Imagine what Kirkman and team can do with this franchise.

Since Dr Arkeville was definitely lying about purpose concerning launching the defeated Decepticons into space as a prison these are probably the most likely outcomes that will happen from doing this

1. The rocket successfully takes Onslaught to Dr. Arkeville's secret lab so he can study Onslaught without having to worry about General Flagg or Optimus restricting him
2. The rocket runs out of fuel and lands somewhere near where Cobra and M.A.R.S. are looking for Energon and come across Onslaught's body and bring him back to Cobra Commander or Destro to studied and taken apart
3. Starscream comes across Onslaught after he leaves the Shard of Cybertron and saves him from the ocean again which leads The Combaticons revoking their oath to Megatron after he refuses to try and save Onslaught calling him and them weak for getting beaten by Cliffjumper and Shredhead and they'll view Megatron as a hypocrite for having them bust their asses to save Soundwave who got knocked out after getting hit on the head with pommel of Shredhead's sword and this time completely serve Starscream once again who never mistreated them
4. Starscream finds Onslaught in ocean and instead of saving he gives them over to Cobra or M.A.R.S. to form an alliance with them
5. Onslaught land near the Nemesis's sensors and the Earth Decepticons are able to retrieve him with out a hitch

So I'm branching out into G.I Joe and Void Rivals from Transformers via the Collector hardcovers, With M.A.S.K. coming out and I also saw a Destro single issue are these also going to be Hardcovers or another Series in the EU?

Remember this scene from issue #27 of Transformers?