It wouldn't have mattered or impacted the outcome of the election anyway.
Bloomberg would get around 3%-5% of the vote (and wouldn't even come close to winning a state), which is enough for Trump to win. This is good news, even though I like Bloomberg a lot.
Sanders will obviously not win the Democratic primary, and Bloomberg said that he'd run only if Sanders and Trump/Cruz won their respective primaries. This shouldn't surprise anyone. Bloomberg will most likely not run.
Most polls have also shown that Bloomberg would get 10%-25%, and he hasn't even spent billions campaigning yet. I think this is because third party candidates always overperform in the polls. He'd only get 3%-5% of the vote.