Blackwell was dismissed after just over two years in charge.
Leeds United have not featured in the Premier League since 2004.
Leeds United made a number of signings in the summer transfer window.
Warnock's Rotherham beat Leeds 2-1 yesterday.
The current QPR assistant hopes to see Leeds back at the top.
Crystal Palace have handed ex-Leeds United manager Kevin Blackwell a spot on their coaching staff as a consultant, reuniting him with Neil Warnock.