It was previously reported that Monday Night Raw Superstar Roman Reigns recently said in an interview that WWE's upcoming 50-man Greatest Royal Rumble event will likely air on the WWE Network.
A fan on Twitter noticed that while attempting to cancel their WWE Network subscription, an advertisement appeared which seemed to confirm that the Greatest Royal Rumble will indeed be shown on the WWE Network:
The WWE Network will be showing the Greatest Royal Rumble. If you attempt to cancel your subscription, this message appears. pic.twitter.com/ZnJvM1I8bz— ʜᴇᴇʟ ʙʏ ɴᴀᴛᴜʀᴇ (@HeelByNatureYT) March 21, 2018