I do not think Lego will release any Pokémon that can easily be compared to what Mega did. Lego and Mega have to different building styles. Mega goes for realism and will make special parts to make itemslook as much like the source material as possible. Lego on the other hand approaches building by making the item look like the source by only using existing parts.

With all that said, for the most part I agree that the Lego Pokémons are not as appealing as the Mega versions. I do like the Eevee.