Failed aircraft in the past, Promising now


Hello ACEOs
In this world of ever-changing environment, something a failure in the past could turn out as a promising one today. So, what are your favourite failed aircraft, but you think could be successful today?

Mine is Dassault Mercure!


VFW 614

A regional jet before anyone needed/wanted one. Unique engine configuration as a bonus


Yeah, it was unique, maybe it would be successful if they also added an Private Jet variant