Super Mario Land 1 & 2, while beloved Game Boy titles, would present significant challenges for inclusion in Super Mario All-Stars on the SNES. The All-Stars collection focused on re-engineered versions of the NES Super Mario games, leveraging the SNES's enhanced capabilities for improved graphics and sound. Directly porting the Game Boy titles would be problematic due to several factors:

• Resolution and Aspect Ratio: The Game Boy's lower resolution and different aspect ratio would require extensive graphical upscaling and potentially a complete graphical overhaul to fit the SNES screen and maintain visual consistency with the other All-Stars titles. This would be a substantial undertaking, potentially requiring the creation of entirely new assets.

• Technical Limitations: The Game Boy's hardware was significantly less powerful than the SNES. Emulating the Game Boy's limitations on the SNES would be inefficient and likely result in a subpar experience. A true port would require significant code rewriting to optimize for the SNES's architecture.

• Gameplay Differences: Super Mario Land 1 & 2 featured gameplay mechanics and level design distinct from the NES Super Mario games. While some elements could be adapted, maintaining the original feel while integrating them into the All-Stars aesthetic would require careful consideration. The unique power-ups and enemies of the Game Boy titles might not translate seamlessly.

• Sound and Music: The Game Boy's sound capabilities were limited compared to the SNES. The music and sound effects would need significant enhancement to meet the SNES's audio standards. This would involve either recreating the soundtracks entirely or employing sophisticated sound emulation techniques.

• Cartridge Size: The SNES cartridges had a larger capacity than the Game Boy cartridges. However, the amount of data required for a high-quality port of both Super Mario Land games, including enhanced graphics and sound, might still push the limits of a reasonable SNES cartridge size.

Therefore, a hypothetical "Super Mario All-Stars + Super Mario Land" would likely involve not a direct port, but rather a reimagining of the Game Boy titles using the SNES's capabilities. This would mean creating new levels, graphics, and music inspired by the original games but designed specifically for the SNES hardware and gameplay style. The result would be a new experience, rather than a simple port, potentially offering a blend of classic Game Boy elements with the enhanced visuals and sound of the SNES. This approach would address the technical limitations and ensure a cohesive experience within the Super Mario All-Stars collection.