Class 1A were fighting off villains and Nomu's then suddenly a Portal opens up then three Tenno/Warframes, Volt, Mag, and Excalibur, came through, the three were confused, yet alerted, they had they're weapons on them

Aizawa: what the-?

Deku: more hero's?

Bakugo: what the hell are they?

Iida: these hero's seem different