Lore wise, not really.
Saitama thinks Sonic and Flash are on the same level (because of their actions).
Flash is like "same level?" "what were you looking at?(while fighting against Garou and PS)"
Saitama then responds to it saying "about how Flash didn't sink but Sonic did
He then believes Saitama's misunderstanding comes from "Saitama beat Garou who beat PS who beat (he was captured off guard d
Flash" and "Saitama beat Sonic" etc.
Also Hellfire and Gate wind warns the other ninjas that Flash is way too fast, faster than they think.
1. This Flash seems arrogant like chapter 90-160. It might be a little different (at least dialogues)
5. There were never an army though, narrator just explained his plan.
Also it's quitely that we might not even see Void absorbing Garou, considering How Blast didn't comment about Saitama.