The Czech striker suffered a broken leg not long after initially signing for Aston Villa.
The Czech striker has only made two substitute appearances this season and has not featured for the first-team since Bruce's appointment in October.
Rushian Hepburn-Murphy's first-half strike failed to prevent Kevin MacDonald's side from falling to a 2-1 defeat at Villa Park on Monday night.
The Czech international striker can't buy a game at Aston Villa.
Striker showed a glimpse of his talent for Villa's under-23s.
Aston Villa failed to take their chances in a tight fixture.
Roberto Di Matteo's men recorded their second clean sheet of the season as they drew 0-0 with the Rams at the iPro Stadium on Saturday evening.
Adama is likely to miss Sunday's season curtain-raiser at Sheffield Wednesday after only just returning from injury, but the club's new £12 million signing should feature.
Villa could have Ciaran Clark back for the weekend's clash with Watford, but Kieran Richardson remains sidelined with a calf problem.
Libor Kozak has made just five first-team appearances since December 2013.