My guess is that Putin will give up Iran in exchange for a part of the Ukraine that Russia already holds.
It is not truly in Russian interests to have a nuclear-armed Iran. And a Russian "victory" in Ukraine has already cost Russia more that it is worth. I suspect a deal is on offer.
“My guess is that Putin will give up Iran in exchange for a part of the Ukraine that Russia already holds.”
That seemed like an obvious deal to me a while back. Now, I’m not sure Russia has any cards. Still, it could bring an end to two hot spots.