Spectral energy distribution model showing additional components: synchrotron emission (purple) and bremsstrahlung (cyan) from electrons accelerated at stellar-wind termination shocks in Cygnus OB2, hadronic emission from the same source (grey), and inverse Compton emission from the supernova remnant shock (pink). The latter is normalised assuming a supernova energy of 3 × 10⁵¹ erg and an acceleration efficiency of electrons of 1%. We show radio upper limits from Abeysekara et al. (2021), which were derived for the entirety of the Cygnus Cocoon. We assume uniform B = 5 µG and n = 0.05 cm⁻³ in the superbubble.