Interesting as I thought the previous intent was for a Polish K2 to replace the old 72's. Maybe there were too many problems getting that program up to speed or do the intend to replace the Leo2 with the K2 later. The T-72's could certainly find a home somewhere I mean it is the most common tank in NATO
I read an article on Wiki, translated from Polish, that the Poles wanted to upgrade about 318 of their T-72's to the T-72M1R. They want to have 19 Tank Battalions from the current 12/13. Don't know if current thinking/decision has changed the calculus.
According to the article, Russia still has about 4400 front line tanks that they can put in play. (although to do so would seriously reduce their deterrent effect vis-a-vis China.) More than half are upgraded T-72 variants and newer, which significantly outguns the Poles' current T-72. Don't know much about the M1R, and how well it would do against a T-80/72. I am pretty sure that the LEO 2's and M1's would wreak havoc with most Russian tanks in an Armour-only battle.