  We speculate about the origin of the recent excess at ~750 GeV in diphoton
resonance searches observed by the ATLAS and CMS experiments using the first 13
TeV data. Its interpretation as a new scalar resonance produced in gluon fusion
and decaying to photons is consistent with all relevant exclusion bounds from
the 8 TeV LHC run. We provide a simple phenomenological framework to
parametrize the properties of the new resonance and show in a model-independent
way that, if the scalar is produced in gluon fusion, additional new colored and
charged particles are required. Finally, we discuss some interpretations in
various concrete setups, such as a singlet (pseudo-) scalar, composite Higgs,
and the MSSM.
