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All of this , however , begs the question : how was Doc able topayfor all this future gear mechanism ? Money is still in habit in 2015 , after all , and item actually be well more than they did in 1985 , thanks to pomposity ( the hover - conversion alone cost a thumping $ 39,999.95 ) . Plus , Doc had already spent his family fortune building the time machine , meaning he was already moderately depleted on funds . The answer ? Superman .

As Doc explored the Hill Valley of 2015 , he realized the future had much to offer – but also that he could n’t afford any of the awful gadgets and inventions . Hoping to resurrect some fast Johnny Cash , Doc render to pawn some gadgets from 1985 , but quickly discovered that inventions like VCRs and electric cell speech sound were deserving next to nothing in the future . last , Doc visited the library where – after find out how to use some antic succeeding invention called the “ Internet ” – he lead some research and discovered “ the individual greatest investiture in the chronicle of man . ” Jumping back into the DeLorean , Doc travel to April 18 , 1938 where he invested a single silver medal dollar sign into buying ten copies … ofAction Comics # 1 .

Lex Luthot comic and live action

That ’s correctly – the individual heavy investiture in the history of man turned out to be a comic book showcasing the first visual aspect of Superman . While each issue only be Doc ten cents in 1938 , by 2015 he was able-bodied to sell asinglecopy for thelow lump price of 2.5 million clam . Realizing he was now set for life and could only sell a funny book anytime he was down on cash , Doc went on a shopping spree and got his car hover - convert , purchase a Mr. Fusion twist , and tote up twelvemonth to his life at a greening clinic .

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James Gunn’s Superman and Krypto comic

Jon Kent (AKA Superman’s Young Adult Son) with Kryptonite in the background

Superman Back to the Future Comic Secret

Back to the Future Doc Finds Investment

Back to the Future Doc Action Comics Superman

Comics

Superman