EntertainmentTVAction ShowsMarvel TV ShowsEchoEcho episode 2 features a major X-Men nod – though it’s not the first time it’s been mentioned in the MCUWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. EntertainmentTVAction ShowsMarvel TV ShowsEchoEcho episode 2 features a major X-Men nod – though it’s not the first time it’s been mentioned in the MCUWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. When you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. (Image credit: Marvel Studios) Marvel has been teasing theproperintroduction of the X-Men into the MCU for a while now, with references to mutants popping up in Ms. Marvel,Doctor Strange and the Multiverse of Madness, and more.Echo, it turns out, hasn’t bucked the trend. In episode 2 of the newly released Marvel series, which catches up with the titular Maya …