I think people forget that while at Spurs he played 134 games as a wide attacker in a 4231. 142 games as an attacking midfielder. His best numbers (goals/assists) came as a right winger. If we are interested, it is to play him on the RW. Maybe he would be a more natural alternative to Bruno too, but that is not why I think we could be interested.
It is a bit surprising that so many people seem to consider it far fetched.
A) He was a regular and a key player for a very good PL/CL-side for several years,
B) He is versatile and has played a number of games as a wide attacker in a 4231, including RW (where we lack people),
C) Still just 28!
D) He is basically free and highly motivated to prove himself,
(E) There is a Scandinavian-connection. Might not mean anything, but OGS could ask his old friend Hareide about Eriksen.)
If his legs/motivation turns out to be gone it will not matter much at all to us. We will not be any worse of than we are (maybe £2 mill). If they are not, and we get him back to the level he used to be, we could go from zero RW to one of the best in the league (made the team of the year in 17/18 and played most of the minutes as a RW that season).