Why is Tobias in a Marvel movie? Infinity War directors Joe and Anthony Russo also directed several episodes of Arrested Development including the pilot.
Which is why there's also an Arrested Development Easter egg in Russo brothers-directed Captain America: Civil War. You can see the Bluth family stair car behind Ant-Man.
And Entertainment Weekly says they "have it on good authority" that there will be another Arrested Development nod in Avengers 4.
It's honestly just one more reason why I can't wait until next year.