When we last stopped by 888 Olive Street in September 2013, construction on the Onni Group's 32-story mixed-use development had only progressed to the third level above ground.  Fast forward to mid-2014, and the building has already become a dominant presence in South Park, rising 27 stories above the intersection of 9th and Olive Streets.  Expected to open in early 2015, the tower will offer 283 luxury apartment dwellings and 11,000 square feet of street level retail and restaurant space.  Despite a plethora of residential developments currently underway in Downtown Los Angeles, 888 Olive Street remains one of the neighborhood's few high-rise bright spots.  However, the Onni Group's $100 million project may be just the first of several glassy towers to spring up in South Park over the next few years.  In March, Onni revealed plans for a 50-story skyscraper to be located on an adjacent parcel to 888 Olive Street.  One block north, San Francisco-based Carmel Partners proposes a 27-story tower near their future G8 apartment complex.  A short walk west, CIM Group unexpectedly started work last month on the parking garage of a proposed 33-story tower at the corner of 9th and Hope Streets.