The managed evolution of the application landscape is commonly regarded a focal point of enterprise architecture (EA) management. Therein, aspects of future planning and historization apply, for which no generally accepted information model yet exists. This paper addresses this challenge by identifying requirements regarding an information model for temporal application landscape management from an extensive survey, during which the demands from practitioners and existing tool support for EA management were analyzed. Furthermore, we discuss shortcomings of existing approaches to landscape management in literature and propose an information model, which can address the identified requirements via modeling techniques from nearby disciplines.