Legality depends on the tournament format -- Quick Draw can be legal in some formats and banned or restricted in others
At ~11,675 expected value vs ~9,000 market price , OP-09 is one of the rare TCG products where the probability-weighted math works in your favor
However, that was just reprinting six cards, and there are hundreds of new cards in the 40k commander decks - not to mention that the Astartes, Necron and Tyranid creature types are part of Games Workshop's intellectual property, so presumably can't be reused without their license.
Murders at Karlov Manor featured an offshoot of morph called disguise. The only difference here was that disguise creatures have ward 2, an attempt to bring morph up to speed with modern-day design sensibilities
Fusion Summon 1 Fusion Monster from your Extra Deck that lists that monster on the field as a Fusion Material Monster, using it as the Fusion Material