>>9353513A lot of them like Umaga and Tensai were seemingly just there to eventually put over Cena, Taker and such. Of course some never made it that far.
Ezekiel is who I think you're talking about, who got a pretty hard push in ECW, made it to SD, and then was just gone.
Developmental was also a mess then, They ended their relationship with OVW and decided they wanted to do their own school/promotion, starting with Deep South in like 2006, then FCW, then finally NXT.
