#2 John Cena wins the Intercontinental Championship
John Cena is a 16-time World Champion, 5-time United States Champion and a 4-time Tag Team Champion, he even won the Royal Rumble match twice (in 2008 and 2013) and the Money in the Bank briefcase in 2012... But he has not won the Intercontinental Championship yet.
To be a Grand Slam champion (in its modern format) you have to win at least one World Championship, a Tag Team championship and the US title and the IC title.
There has been 19 individual Grand Slam champions and, in the last two years, we witnessed some wrestlers finally become so: Seth Rollins, Chris Jericho, Roman Reigns, Dean Ambrose and Jeff Hardy. 2019 can be John Cena's year so he finally joins this exclusive group where, as one of the greatest of all time, he should be.