Nintendo announced via Twitter that the NES Classic Edition will be re-released on June 29. The console will still cost USD $60 and will include the same 30 titles. Nintendo stated that both the NES Classic Edition and SNES Classic Edition will be available through the end of the year.
https://www.notebookcheck.net/The-NES-Classic-Edition-is-coming-back-June-29th.303414.0.html