I think 0x (ZRX) will hit the Coinbase platform at first. The reason is that 0x project founder is also a team member of Coinbase.

What do you guys think or have any other strong project with a valid reason why they'll list it first?

P.S. Coinbase has recently announced of listing ERC20 tokens in the upcoming months.
Source: https://twitter.com/coinbase/status/978345541053530113