With regrets, agreed. I think we are entering into a time of desperation in particle physics...

Negative on both fronts.

CMS update:

The new results show no significant excess in the relevant region (Figure 2) and do not confirm the previously observed evidence of an excess. Using only 2016 data, an upper limit on the cross-section of 1.5 fb at 95% CL is obtained. Additional searches in related channels like X→Zγ have not shown any significant excess around 750 GeV mass either.

ATLAS update:

At the mass and width corresponding to the largest deviations from the background-only hypothesis in the 2015 data, no large excess is observed in the 2016 data. The excess at an invariant mass of 750 GeV as seen in the 2015 data is therefore not confirmed with the 2016 data. The compatibility of the 2015 and 2016 datasets, assuming a signal with mass and width given by the largest 2015 excess, is on the level of 2.7 sigma. This suggests that the observation in the 2015 data was an upward statistical fluctuation.

Looks dead, at least at CMS. Still waiting for ATLAS results but very unlikely to get to 5 sigma now.

Here is a nice table summarizing the current experimental situation and giving significances from both experiments.

Well, not all of the hoped for analysis has been released, but the resonance definitely fared well with the new data included at Moriond. See https://indico.in2p3.fr/event/12279/other-view?view=standard for slides and http://resonaances.blogspot.com.au/2016/03/diphoton-update.html for a blog summary. Bumping up my prediction.

@xenophage: Any force carried by the (hypothetical) new boson would be extremely short ranged (limited to a fraction of a % of a proton diameter) since the new particle is so massive. The usual battery of fifth force experiments is irrelevant to this scenario.

A new force carrier demands a new force. The universe does not such for its observed operation to be explained.

Really good summary of the current status here: http://www.nature.com/news/who-ordered-that-1.19514

I've updated the resolution criteria to be more precise, now demanding a total 5-sigma evidence of departure from standard model physics, with no demand that the discovery be termed a new boson in the announcement.

These things tend to come and go, so I'm leaning strongly towards "no". As a hep-th physicist I would love to be wrong on this one.