The current suit is just asking for a restrain from those states for counting. Those states would be thrown out until the case could be heard. If they rule that way, there is no way wrinkly balls could currently have enough votes to get him in. The inauguration would be delayed.

At whatever point it would go to trial with evidence presented. If evidence is shown, then the court would uphold their ruling that those states would be tossed, and it would go to the legislature, as provided by the constitution.

The sticky point would be if the court now rules to hold the count on those states, but later does not see enough evidence to uphold that.

But, with at least 5 judges thinking with their head removed from their ass, is should be pretty clear cut.