I think Lourdes Park will be torn down and removed or relocated. Then additional bleachers and/or seats will be added behind and above the existing bleachers.
I also heard that the timeline for getting this thing finished between the end of this season and the beginning of next season will be EXTREMELY tight. I was told that we should not be surprised to see some of the construction start prior to the end of this season behind the existing bleachers and in areas that would not have an effect on fans or the team during this season.
We shall see.