Sorry but I don't understand your pictures. You are talking about 2 bathrooms but we see only one floor plan. Is the 1.52M x 2.24M the 5 x 8 bathroom in your dilemma title. If so, can we see the floor plan of the 5 x 9 bathroom? Is the space with a small rectangle in the middle the extra 5.5 x 4.9 ft space you mentioned in your dilemma? Also 1.52M x 2.24M is in reality 5'0" x 7'4". This is 8 in. less. It can make a big difference on how to place fixtures in a bathroom.

Thanks a lot for your comment. I wouldn't exactly call it a walk in-closet. As you can see from the drawing, Its space provided for two single wardrobe (one on each side). Maximum width can be around 3.5 ft. The humidity point is quite relevant. The question is would it be possible to include a wet room in the space i.e. 6ft x 8.6ft. - considering I don't remove the dress wall. Wanted to get a sense on the possible layout. Thanks and look forward to your advise.

Thanks! I was also leaning to leaving the short wall alone but wanted some outside advice :) appreciate the opinions!

Here you go.. Iron Man: https://www.amazon.in/3DlightFX-Iron-Mask-Deco-Light/dp/B00WUDSS4K/ref=pd_sbs_21_3?_encoding=UTF8&psc=1&refRID=66JPRHWGBQV4W76YX6TW&tag=csds0c-20 Captain America: https://www.amazon.in/3D-Deco-Light-Captain-Childrens/dp/B00DDHDDCO/ref=pd_sbs_21_1?_encoding=UTF8&psc=1&refRID=66JPRHWGBQV4W76YX6TW&tag=csds0c-20 Spiderman: https://www.amazon.in/LIGHT-Spider-Man-Spider-Light-MARVEL/dp/B00GKMHIDO/ref=sr_1_1?s=toys&ie=UTF8&qid=1505934989&sr=1-1&keywords=spiderman+deco+light&tag=csds0c-20 Thor hammer: https://www.amazon.in/Avengers-Light-Hammer-Decoration-Mount/dp/B00JXFU4MW/ref=pd_sbs_21_4?_encoding=UTF8&psc=1&refRID=66JPRHWGBQV4W76YX6TW&tag=csds0c-20 Hulk: https://www.amazon.in/3D-Deco-Light-Hulk-Childrens/dp/B00DDGYXHE/ref=pd_sbs_21_2?_encoding=UTF8&psc=1&refRID=66JPRHWGBQV4W76YX6TW&tag=csds0c-20 Thanks, Amit Cornerstone Designs Bangalore.