The man who almost singlehandedly sealed Brisbane Heat's Big Bash Twenty20 title last season - reformed batsman Luke Pomersbach - has pulled out of next month's lucrative Champions League (CL) due to personal reasons.

The comeback story of last summer has now suffered a setback, telling the Heat he is not in the right head space as he deals with a "family bereavement and serious health related issues to several other members of his family".

Queensland Cricket raised eyebrows in July 2012 when they threw Pomersbach a cricketing lifeline by offering a one season deal, drawing comparisons with the doomed Brendan Fevola-Brisbane Lions AFL union.

He relocated to Brisbane from Perth to play club cricket after being dumped by the Warriors for alcohol-related discipline breaches.

Queensland signed him just a month after Pomersbach's career looked doomed when arrested for assault in India while playing in the IPL, however, he was cleared after charges were withdrawn.

But Pomersbach overcame his personal demons to star in the BBL last season, plundering 397 runs at a strike-rate of 140 as the Heat claimed the tournament final and booked a much anticipated CL campaign.

However, Pomersbach told the Heat he was not available after enduring a tough four-week period.

"The last month has been amongst the hardest of my life and at the moment I don't feel that I'm in the right frame of mind to play competitive cricket," he said in a statement.

"My family is the most important thing to me at the moment. These events have impacted on my preparation and I don't believe I'm currently in a position to perform at a level I'd expect of myself or of my teammates."

Queensland Cricket chairman of selectors Trevor Hohns said they fully supported his decision.

"He will resume training with the squad at an appropriate time and we will closely monitor his situation with a view to understanding his future availability for selection," he said.

The Heat leave for the $6 million CL tournament in a fortnight and will receive $500,000 just for participating.