To the above post, I think that wouldn't be such a bad idea. Friendships were a little too cheesy for my liking and got pretty boring after seeing it only once. (even fatalities lose their charm after a while, but I digress) If it is both humorous yet still kept semi-serious (kind of) then I would back this idea. For another example, Cyrax could unleash one of his bombs, causing the opponent to fluster, but then it turns out to be a dud, mass hilarity ensues. Just an idea.
Friendships were supposed to be cheesy. And were made as a joke in response to the complaints against MK's violence.
I think including Friendships would be a brilliant little nod to the golden days of Mortal Kombat.