The article here on the Diario de Almería site describes plans for a modernisation of the Almería football stadium. The aim is to have the stadium open again by September 2020. My guess is that some preparation work might be done during this season. However I guess that the bulk of the work will be done in summer 2020.
The original stadium can be seen in the bottom half of the photo above. At the moment there are temporary stands on the running track behind the goals. It looks like these will be removed. With the new roof covering what was the running track when the stadium was used for the Mediterranean games in 2005. The idea is to keep the sun off the people in the stands.
A lot of fans had hoped that the pitch would be lowered. However this work is not being proposed as it would take too long.
Read More for a Google translation of the article.