One of these guys peers has an attack that generates a tiny BIG BANG (AncientVolcamon) while another casually sinks continents (AncientMermaimon). So it depends on how you interpret the tiny big bang, otherwise they still stop at the Weather Trio.
These guys survived a large planet level attack (the piledriver that destroyed the three moons) and are FTL so even Rayquaza might not be able to stop them. Probably gonna need the universal boys like Necrozma, Lake Trio, Palkia, Dialga, Giratina etc.
I thought at least before that Tri WarGreymon (and MetalGarurumon) could possibly get Planet level scaling from Imperialdramon FM since their peers fucked him up in Tri, but yeah that's only if we agree to scale that Tri Imperialdramon to the 02 version.
Otherwise they didn't do that much and at least their speed would still remain the same, WarGreymon put Alphamon on its knees for a while but it wasn't like the Angemon vs Vamdemon incident i.e. Alphamon didn't scream in pain. Still, he might benefit from it a bit since it was Alphamon in any case, and that Alphamon matched Omegamon after that albeit it used Ouryuken.
And WarGreymon manhandled Tri MetalSeadramon about as casually as Base Etemon handled Chosen Adults in his fights, ie should be at least a few tiers above MetalSeadramon at the point, but I don't know if it's that impressive because 02 WarGreymon is already clearly above MetalSeadramon's tier.
So it depends if you agree to scale them to the 02 Imperialdramon FM, otherwise it's a very iffy I admit.