Hot on the heels of the forthcoming domestic launch of Kia's K7/Cadenza, we bring you the latest spy shots of Kia's upcoming replacement for the mid-size Optima sedan, to be called K5 in the Korean market. The current-generation Optima, badged as Lotze in Korea, made its debut in November 2005 and was significantly revised for 2009 with major styling updates. Scheduled to make its Korean debut in April 2010, the upcoming Optima/K5 (code-named "TF") will be a complete redesign. As indicated by spy shots, Schreyer's latest work will also be substantially larger compared to the current model. Stylistically, the K5 is a stunning departure from the mundane style of the generation it will replace. The front end will feature Kia's sleek corporate fascia(for reference, see the new Sorento and Forte) incarnated by Peter Schreyer. As evident in a close-up shot, the K5 will also be available with LED headlights in the Korean market. The side profile is highlighted by a sweeping chrome window sill that extends to the trunk lid. The rear-end will ostensibly resemble the K7/Cadenza. As of now, we have no confirmed details on what engines will be available for the new K5. The 2.4L Theta II 4-cylinder will certainly be one offering, as well as the 2.4L GDI (gasoline direct injection) 4-cylinder with an output of 201 horsepower. In addition, we expect an array of diesel and LPI engines to be offered in various markets. The North American model will likely be available with a 3.5L Lambda II V6 as well. Stay tuned for more information and spy shots in future posts.