Sturridge,Origi,Ings,Fimino and Sane would all have to get injured before Mario got a chance. He won't be here by September 1st. The lad is useless.
What is our depth chart at the moment?
Sturridge, Origi, and even Ings, who is returning from a major injury, are all susceptible to long spells on the sidelines. So you have Mane, Coutinho, Firmino, Ibe, and Ojo left for the front 3, assuming that Benteke is leaving. Among those, Firmino and Coutinho have spent significant amounts of time on the treatment table last year. Ibe and Mane may have consistency issues. Ojo is an unknown quantity.
It's not out of the realms of possibility that he can get a game in. I hope he doesn't though.