If the copied creature is copying something else, then the token enters the battlefield as whatever that creature copied, with the exceptions noted above
Murderous Redcap and Putrid Goblin keep coming back for value, Necromancy and Animate Dead cheat bodies back fast, and Goblin Bombardment is the sac outlet that turns loops into damage
As a side note, the fact that your opponent will have to spend mana on a combat trick instead of anything else (like casting another creature) should make you more inclined to block
If a kid pulled a first edition Charizard, it would be handed around a hundred grubby fingers in the playground and be traded a dozen times before they eventually took it home at the end of the day
Leaving aside the economic part of it, I think having things like Secret Lair and all these alternate art cards is a great way to showcase less conventional art while keeping the main sets visual language coherent
Some grab a land, some grab a creature, some even grab enchantments, but they all draw cards with our commander