As of my last update, there hasn't been an official release of Disciples II on Android. However, there have been similar games and strategy titles available on Android that might offer similar gameplay experiences.
: Demons from hell focusing on raw power and area-of-effect magic. Strategic and Tactical Gameplay
The Dark Prophecy in Your Pocket: A Comprehensive Analysis of Disciples II on Android
Disciples II is a turn-based strategy game developed by Panic! Inc. and published by Gameloft. The game was initially released for PC in 2002 and later ported to various mobile platforms, including Android. This paper provides an overview of the game, its features, and its reception on the Android platform.
Use the "GOG.com" version of Disciples 2: Gold (which is DRM-free). Avoid the Steam version, as the Steam client overlay causes issues in the emulator.