Afaik EZPlayer Pro is NOT included in Superior Drummer nor EZ Drummer, but there are bundles out on the market of both products. Usually the bundles costs more then SD or EZD "standalone" but are cheaper then the sum of both.
I own two licenses of EZplayer Pro (bought one and got another in such a bundle) and open to sell it as a license transfer if someone looks for a license.
Would be nice to have at least some "basic" MIDI editing functions on note, velocity etc. level in that tool or expand it into a full featured (more or less "high level") MIDI editing tool/"plugin" for the DAWs - may be as "EZEdit pro" or similiar.