So is there a Reach Legendary ending or not ?

Its about 4 months till reach has been out a full year, does this thing exist or not!

Nope

Well they said there was and it was an eagle that landed on the helmet. But in the end I think Bungie announced there wasn’t one.

There was, but it was scraped. So no there isn’t. But I can tell you what it was. It was the PoA flying to Halo when Keys said “We made a blind jump how’d they,” Cortana, " Get here first, they’ve always been faster."