Personally, I think Bungie is a real party-in-interest and that the IPRs should not be instituted, as per the law.
However, what I think or what any individual thinks doesn't matter. Sadly, we have seen that the PTAB has a mind of its own so it's really not possible to predict how this will play out.
This is going to take some time to resolve so I wouldn't be expecting any resolution in the short term.