I lack the background to judge whether this will probably be explained by something relatively boring such as a new resonance particle composed of already known fundamental particles (i.e. a new baryon) or maybe an excited state of an already known particle, or something fundamentally new, like supersymmetry, Higgs or something else. This is why I posed the title as a question.
I find it very interesting though that the paper speaks about excluding the "type II two-Higgs-doublet (2HD) model charged Higgs", but I don't know what "type II" there means. The 2HDM is the simplest way you can extend the Standard Model Higgs field (which is what all the Higgs search buzz is about) in to many beyond the standard model theories, like supersymmetry. At least the apparently quite popular minimal supersymmetric model has a 2HD. But the key question is what's type II, and where's my type I?