what if the science/tools that'll prove Islam right isn't here today?

Isaac newton is considered the greatest scientist to walk the earth, yet many of his theories were debunked by Einstein. Meaning scientific ideas we know as facts today could be proven wrong a century or so.
Honest question because science is always progressing. Compare where science was couple hundred years ago when they used to burn 'witches' to where it is today.
Science isn't obsolete so using the bit we know today to draw, unequivocally, that God doesn't exist is a decision made prematurely.
Maybe in the year 3000s or something science will finally be like yeah there is a God.
what then?