As we saw a couple of days ago, trademarks were made for Legacy of the Duelist: Link Evolution. Of course that doesn't confirm any sort of release yet but I imagine it's very likely to happen.

If Link Evolution gets released, what will that do to the leaderboard? Will it be updated or will there be a new leaderboard entirely?

I suppose it depends on whether or not it's an update or re-release. This question is probably too early to be asked but it's something that will need addressing.

Also as a side note: I've noticed that it's taking a while for runs to get verified, if you need another mod to help out with verifying runs I don't mind doing it.

As you say, we don't really know much about Link Evolution yet, too early to make any clear decisions. It's gonna get adressed when we eventually get there. Millenium Duels is very much an early LotD and that game is its whole seperate page.

On the side note: To have any standards on the verifying, it will take a little while to get some of the runs verified, LotD is the biggest amount of YGO speedruns submitted by far and speaking for myself, I look through the runs in real time at the very least and sometimes check it out further. So sometimes runs can take a while to get done, but don't worry, we try to get the runs done as soon as possible. Appreciate the offer, we will ask for further assistance if we think its needed :)