As a commander, Isshin is cheap, and its awesome at increasing the advantages given by attacking immediately
I have to imagine thats the case, but weve got a few other sets between now and then
Any "as [this creature] enters" or "[this creature] enters with" abilities of the copied commander will also work
A note on the power armor: it's pretty weird that Wizards is reprinting Fallout cards as Fallout cards with slightly different names
Technically you sacrifice all creatures you control, not just the stolen ones, but if you have a way to reanimate or blink Emrakul, you can just steal some more
Obviously I have nitpicks with individual cards -- I've been yelling about Temple of the False God only being good in decks that reliably land ramp and it's especially bad in decks with lots of color pip requirements -- but these are just nitpicks