Ice Cube and his partner in the BIG3 basketball league have filed a $1 BILLION lawsuit against multiple Qatari investors who allegedly failed to pony up their money for the league.
TMZ Sports has obtained the complaint in which Cube and Jeff Kwatinetz are suing several individuals including Sheikh Abdullah bin Mohammed bin Sau Al Thani ... the CEO of the Qatari Investment Authority.
Cube says the Qataris were supposed to invest $5 MILLION and be passive investors in the league -- but instead "quickly started to insinuate themselves into the affairs of BIG3 despite failing to live up to even their most basic obligation to fully fund their investment.