Super Polymerization how does it work
Does that translate to the opponent has 3 random monsters that I take to summon Blue Eyes Ultimate without any Blue Eyes? 


No, you must use the correct fusion materials for the monster you wish to fusion summon.

If superpoly let you do that it would be too broken.

The advantage of it is that is quick-play, so you can fusion summon during your opponent's turn.

This card was mostly used in Hero decks, where many of the fusion monsters have as requirements "1 hero + some attribute-specific monster"... So you could use your hero and (say) your opponent's dark effect monster to summon Destiny HERO Dangerous.