Follow-up of eROSITA and Euclid Galaxy Clusters with XMM-Newton
  A revolution in galaxy cluster science is only a few years away. The survey
machines eROSITA and Euclid will provide cluster samples of never-before-seen
statistical quality. XMM-Newton will be the key instrument to exploit these
rich datasets in terms of detailed follow-up of the cluster hot gas content,
systematically characterizing sub-samples as well as exotic new objects.
