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Trivia: in the 2007 photo and as late as early 2011, what's noted in the first photo as "Sunflower Ave" is now "Rosebud Ave." When this changed in 2011, we should have taken it as a sign that someone was getting ready to build.
The Corralitas Red Car Property was a private right-of-way through Silver Lake (Los Angeles) for the Pacific Electric interurban streetcar. The “Big Red Cars” ran until 1955 when the Glendale Line was decommissioned for freeway construction. For more than 40 years, a series of developers tried and failed to develop the Corralitas Red Car Property.
It's not a park, it just looks like one.