History has shown that one of the best things you can do in the Modern format is play an aggro control deck tuned to fight the metagame. Josh Utter-Leyton went deep at Pro Tour Philadelphia using a unique take on Zoo and there's no reason Wild Nacatls shouldn't be able to take up the mantle again.
Today's deck is incredibly interesting because it's a Zoo deck that takes advantage of Chalice of the Void, opting to play very few one-drops of its own. There are some counterspells, powerful removal spells, Snapcaster Mages, and even the underrated Seeker of the Way! Of course, it wouldn't be a Modern deck without some Treasure Cruises to help the deck refuel after an attrition battle.
By being the full five colors, you get to take advantage of Tribal Flames while also having unlimited sideboard options. Cards like Abrupt Decay and Slaughter Games are perfect for dealing with problematic matchups.
I think Zoo has what it takes. It just might need to be a little creative.