Bumping this for you.

It's tempting to tick off the wishlist, but the space will be used regularly, by you and guests. So keep it simple, straightforward, practical, make it easy to use and clean regularly, and prioritise the list. No tight spots, but clear floor space and functionality is important in sich spaces.

The toilet is a necessity...

One sink is a necessity, but because of the frequent use, two is better.

Either a bath or a shower is a necessity. Both is luxury, and would make the space cramped unfortunately. A combo is always less user-friendly, and with the frequent useage, I suggest a stand alone shower rather. A sizeable one is manageable.

With something like this, you should have sufficient storage too.

Since this is a remodel could you show a current before picture to show existing locations of fixtures. And what you DON'T like about the layout. And what you think you would prefer.

I don't think I would get rid of the tub on the main floor, especially when young kids will enjoy their bath time in it. You may be best off with a single vanity, some storage and a tub.

Maybe you could use the soaker tub in the basement to create a spa bathroom.

If you are able to finish the basement so that it seems like a part of your home and the finish is on par with the upstairs, I am sure you would recoup its value. That would mean large windows in the basement and a couple bedrooms and the soaker tub.

What don't you like about your bathroom you have? Is the tub in good shape?

Is there a possibility that the basement will be finished in the near future and you will not need a tub on the first floor?

Current bathroom is completely unusable except the toilet and sink. The shower/bath leaked when used, so we've been showering in the basement for at least the past 7 years. It all needed to go. Tub was miniature and poorly placed (the faucet was on the sink/internal wall - basically right below where the brush is). See the photo below. So happy to see it go.

The basement will be done next. It's usable but agree we need to bring it up to par with the new look/feel/design of the upstairs. Downstairs we have 1 of our 3 bedrooms and my thought was to put the tub downstairs to use for kids bath time. We can only put the large windows on one side of the basement, which would be in the current bedroom.

In MY ideal world we would have a nice walk in upstairs and the tub in the basement. But just concerned about resale value down the road and whether that would be a turnoff for buyers with kids to have to bathe in the basement.

I have heard some say it wouldn't make a difference as long as you have a tub and others say we should keep it on the main floor.

If you have the tub in a well-designed basement, I don't think you'd lose by it.

Resale is often a factor to consider, but remember that you need it functioning for your needs primarily.
The location, maintenance, layout and other factors play a bigger role in resale, and I'd rather buy a place with one well designed, relatively spacious bahroom and a tub in the basement (with the option of using it or not), than buy one with a tub I won't often use crammed in to the main bathroom.

Some people have kids in the bath daily. I grew up with easily accessible tubs and don't recall using them more than every few months for fun. How do you think you'd bath your own kids?

If you think the two sinks is a nice idea you wouldn't necessarily use often, then consider one and the tub, but it's not all fitting.