That would be an impressive feat considering he can't die
It's hard to say because I haven't read Sentry taking on someone at a speed level this extreme before..But he would just nuke the area around Flash and return with maybe an arm.
But I see a Stalemate with flash just running in circles. And Flash can't stop Sentry/Void.
But is that burst speed or can he manoeuvre tactically while moving at a speed that can compete with Flash? Meaning Flash can change his direction on the fly because he can actually slow down time...dodging him. But I guess Flash will have to sleep sooner or later!
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As far as i know there is nothing solid that cofirms his fighting speed. But given their are a few showings to suport it. Speedblitzing HuLk and Thor for instance and when he grabed Carnage and flew out of space as he ripped him in half he IMO he is FTL
Couldn't have been that fast. Sentry lately was very impressed with Extremis' speed capabilities. But he is much faster.
Plus if Tony got as close as Sentry did he would die/ the armour would melt.
*facepalm* Firstly we have never seen Sentry use his matter manipulation powers other then directly on Molecule Man, who is a far cry from his Secret Wars days.
Also just because you can't be killed doesn't mean you can't be knocked out as Sentry has been several times. It's far to early to say how stronger Sentry with his molecular manipulating powers as we have only seen it once, but we havn't seen him really use in battle to alter the suroundings or do much else.
Could Sentry win? Potentially, but Sentry's powerlevels are still to this day a mystery.
Tossed Void into the Sun?
I thought he tried to commit suicide. And Void mocked him stating that they were the same guy and the Sun couldn't do squat. And that he should just let Void in to get the job done right.