That doesn’t count as a concept car because it actually entered production. This one does simply because it didn’t:
Lotus tried to resurrect the Esprit in 2009 with this striking mid-engined concept. Originally slated to use the 5.0L V8 from the Lexus IS F, it was later mean to receive a bespoke normally aspirated V8 - which would have been their first in-house engine for over a decade. But this project, along with the four others planned by Dany Bahar (including a larger Elise, a reborn Elan, and a new Elite) was abandoned after new owners DRB-Hicom nearly ran out of money. Lotus ended up using the spare funds to update the existing range instead.
Now that Geely has bought Lotus, the probability of an Esprit revival could increase from absolute zero again if the company’s finances improve. An expert’s view on how a new Esprit could finally see the light of day can be found here: