Live albums of mostly all-original material?

what is that album(s) that was actually recorded live, but was almost marketed as just "the next album?" 

to boot, also contains great sound quality and mostly original songs
 

Concert for Rock Band and Orchestra, Deep Purple.

Interesting picks, and I suppose they fit the bill. Sheik Yerbouti only kind of counts because, like many of his albums from the late 70s-early 80s, many of the basic tracks were recorded live (in this album's case, from the 1978 Hammersmith performance, available in full from the ZFT), but there are a loooooot of overdubs, much more than Roxy. And some of the tracks are just straight-up studio tracks. So I would hesitate to call that a true live album compared to Roxy & Elsewhere and certainly to NY and Broadway. Also, while much of the material on Broadway the Hard Way was not available on record at the time, several of those tracks had been played live before in previous tours. That being said, a decent amount on there was indeed unique to the final '88 touring band.

I forgot about Ricochet. Good call! 

You raise good points, however, despite the overdubs and some studio tracks (thread said "mostly live") I consider Sheik a live album for its sheer reliance on live recorded basic tracks to carry that live sound throughout the record - something Hendrix would do on say... Electric Ladyland

Collegium Musicum - Marián Varga & Collegium Musicum (1975)

The Nice - Five Bridges Suite (minus Intermezzo)