Some players might have been less than thrilled but it wouldn't have gotten anywhere near the same reaction
Spider-Man himself appeared in the Infinity Gauntlet saga and has been part of several Infinity Stone-related escapades and battles with Thanos over the years, but was that enough to go on
This goes for Pokemon too, especially because the dominant Rule Box Pokemon are no longer around -- you probably wouldn't expect Cramorant, Lapras, and Wailord to be Water's strongest attackers, but in this format, they can dominate
(What's the lore behind your pirate-unicorn team-up
So, even attacking with him only him means you'll get access to casting the top five cards of your library
[5] Take the top 5 cards from your deck and add them to your hand