How will Illidan react to learning that Arthas is dead?

Title. This was such an iconic match up. These two were easily my favorite characters in all of WoW. IIRC, it was a big deal to Illidan that he met defeat by Arthas. Now with Illidan back, he seems to be strictly LEGION LEGION LEGION. Anyone think we'll ever see some connection back to these two? I would love to get an actual cinematic of the two fighting with the updated cinematic.