I prefer to see Iran Annex Azerbaijan and Russia take Armenia.
Russia has absolutely 0 ties culturally , linguisticly, or religiously to azeris. it would just be open occupation.
that region called "azerbaijan" was Iranian for 1000s of years, and the peoples across the 2 borders are almost identical (Iranian azeris, azerbaijanis). it would be a seamless transition.
Thats the exact reasion why KGB aliev regime is heavily anti-Iran to the point of being pro-zionist. and specifically adopting pink panturk ideology to alienate Iran, and make fantasy terrotorial claims against IRan.
the azeri regime sees Iran as an existential threat of long term annexation. the only way they can prevent that in their deluded minds is to become an open Iranian enemy in geopolitical terms. They literally invited tiny little shit stain zionist israel and planted their mossad rats right on the Iranian border. The only Iranian border country that dares make such a move.