It would have taken us another year. No matter what victories the Japanese won at that stage, they simply did not have the ability to project invading power into our mainland.
They could not interdict our oil, our steel, our factories. If they won Midway, then it would have taken us about 6 months to replace the losses, and we would have been probably more angry, more focused, and less likely to waste time on the MacArthur approach.
Also,, the Bomb was on the way.
The Japanese had no chance to ultimately prevail. Yamamoto himself knew that.
Probably would have kept Yamamoto alive for at least a little while longer. Don't thinks that the Japanese would have tried to take Hawaii.