You can bring FBX animations into CC4. It is about the same as 3DXChange. You can bring in an FBX file into CC4. It will ask you if it is a prop or a character.
If it is a character, it will take you to the rigging part. I hope this helps somewhat. I imported a prop in the photo just to show you the options you have.
You need the original T Pose from Wonder Studio that you used to make the animation. You bring in the FBX character in a T Pose and rig it in CC4.
I think you need a 3DXChange profile for it to work. I am no expert though.
You go to file import.
God Bless!

Can the motion file exported from wonder studio be imported into iclone without any problems ? Is the bone system compatible ? 

Can we export cc4 characters in wonder studio format and use them in wonder studio? Does reallusion have any improvements in this regard?

That's all stuff I'm trying to figure out.

Seems you'll have to edit the bone structure of a CC4 character to make it work. The rigs aren't the same.  Wonder Studio seems to be using a Blender rig with some weird type of naming structure(?)  I'm out of my element atm.  They do have tutorials for getting a character in.  I haven't tried yet, but there are some known issues people have had with other software.

I just updated Reallusion Hub and it seems 3DXChange is no longer there.  Was going to to try a demo of it quick.  I know it's being discontinued, but it's unfortunate I couldn't try a that workflow. I think you need to the previous reallusion hub to possibly(?) still download the demo.  Can't roll back update either. :-/

Seems like you'd need iClone 7 installed as well to make 3DXChange work properly?

I'll try that out!  Thanks!

Its seems you have to import the wonder dynamics FBX into the old 3D xchange app and use the "Maya human IK preset
to convert to nonstandard and send the animation data to iclone.

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So Wonder Studios > blender auto rig > iclone?
Is there an IK profile you need bringing it into iclone?