The former Arsenal midfielder is interested to see how Lallana gets on at Anfield following his big-money move from Southampton.
The Reds paid a fee of around £25 million for the playmaker and the 26-year-old impressed manager Brendan Rodgers during training on the club's tour of the United States.
However, a knee ligament injury picked up in training means he has been unable to participate in any of the pre-season games, and he is likely to miss the first three games of the season against Southampton, Manchester City and Tottenham.
Merson indicates there will be added pressure, but he could thrive playing with better players.
He told Sky Sports: "I would have to say I really want to watch Adam Lallana next season. I say that because Liverpool is such a step up for him, going there from Southampton for a massive fee and I’m really interested to see how he does.
"I’ll give you an example – Rickie Lambert has scored a million penalties on the trot and then goes to Liverpool and misses his first one in a pre-season game. That’s pressure – and I like seeing how people react to pressure.
"Liverpool is a totally different kettle of fish to Southampton, but Lallana is a really good player and if he gets going he could be an absolute superstar because he’ll be playing with better players now."
Certainly a lot will be expected of Lallana after making it into the PFA Premier League team of the season last term, and commanding such a big price tag.
He is likely to face stern competition in that area of the field, with manager Brendan Rodgers having a wealth of talent to pick from in the form of Raheem Sterling, Philippe Coutinho, Lazar Markovic, Suso and Jordon Ibe.
It would be a little unfair to expect Lallana to hit the ground running after his return from injury given that he has missed a huge chunk of pre-season preparation, but once he has a few games under his belt, it will be interesting to see how he fits into the Liverpool side.