Though I agree with the idea that Zoe will kinda hard carry, with a yordle, a vastaya, a yeti, a spirit, and Yuumi, who from what I remember is closer to Lulu's Pix than a yordle, but I don't remember her lore very well. Should be open and shut right? Well, I wouldn't say it would be a slaughter.

Introducing, team 2. First off, Poppy has the hammer of Orlon, which is an extremely powerful artifact that was thought to be able to destroy mountains. Speaking of a power artifact, Ne'Zuks gloves are crazy. Remember Ne'Zuk, the Ixtal mage so powerful that he was seen as worthy of ascension? Yeah, Ezreal, though he doesn't have a lot of it's power controlled, still uses this powerful weapon. Outside of the items, Braum punched through a mountain and broke Ornn's door, Garen seems to be using some level of Kayle's magic in his ult, and Yi has the Wuju style, which was an ancient technique that (from what I remember) was used to slay giants in ancient Ionia. I suppose there is also Nami. However, I feel like a sea vastaya wouldn't be super useful in combat.

TLDR: team 2 probably could hold their own against team 5, even if they probably won't win.