Yes I think it's a big factor in all considerations of kpop happenings between now and 1 year after all discharge. But remains to be seen how impactful is the return. Never before has a bg returned from long hiatus at this level not Beatles, ABBA, U2, 1Direction (idk if Nsync, BSB, NKOTB had long hiatus or just lvl of popularity/sales just plummetted/fell naturally), also forgot Boyzone, Take That, Blue, Bros, (wat's Gallagher bros band called? Oh right-oasis), nirvana - RIP, Foo fighters didn't reach nirvana levels of fame/popularity/fame(which I think is a boon/blessing for Dave grohl), maybe I'm forgetting others like Pulp(which didn't reach worldwide or much of US, I think).
I also think their fans coulda mostly aged out(which I think happened/or eventually woulda happened to 1D, obvious bgs above - exception might be ABBA/Beatles if they hadn't disbanded(maybe not at same level of sales/popularity/fame) [or younger fans drawn to younger boy groups, but diffracted/not all the same ones] but still... [edit before posting to avoid misunderstanding: following refers to beatles/abba not anyone else- end edit before posting] But they didn't get along/were tired of it(or whatever reasons they decided to break up). Idk since im not a shaman or geomancer LOL. Just my $0.02. Take it for my pov only/with a grain(large ocean?) of salt.