Once in 2017, there was such an ICO project that wanted to capitalize on the heroes of Marvel.
That team made an airdrop, and for those who want a little more, they had to send a small amount ETH.
In the end, the project disappeared... I see that ANN and ... there is a persistent sense of deja vu.
Going across details of this project I don't see they are asking any money.
We must stay away from all projects that asks money prior to giving you any reward.
Good luck with the project.