Do we have any modern "Deinocheirus situations "

[Stegotyranno420]

Remember when the whole appearance of Deinocheirus was mostly unknown, save for some giant arms? So many books depicted it as an extraneously large carnosaur?

Do we have any similar scenarios today where we only have evidence of the body that would lead extreme or bizarre conclusions similar to those mentioned?

[Perotorum]

We kind of had the opposite with barnacle geese, due to seasonal migrations to breed, medieval Europeans assumed they hatched from barnacles, which gave them their name, turns out they are standard vanilla geese.

[Halichoeres]

Kaprosuchus could surprise us.

[Splonkadumpocus]

Andrewsarchus is still a mystery too.

[Libraraptor]

I remember me as a child being amazed by those gigantic arms! I always had thought that Deinicheirus would become the champion, the goat of carnosaurs. Turned out I love the recent version even more

As to your question, nothing specifical comes to my mind. At the moment  I am not that much into the latest state of palaeontology.

[Concavenator]

Deltadromeus and Therizinosaurus come to mind.

[GojiraGuy1954]

Spinosaurus redescription was a year after Deinocheirus

[Papi-Anon]

Barinasuchus is only known by the front half or so of its snout.

The recently discovered basilosaurid Perucetus is only known from some vertebrae and ribs.

Livyatan is only known from a single skull and maybe some younger teeth.

Then there's Tullimonstrum which we have what seems to be the whole body with multiple specimens but it's still baffling us on what living heck it officially should be classified as!

[DefinitelyNOTDilo]

Deltadromeus and Gualicho come to mind immediately, but really all of megaraptora and elaphrosauridae are quite mysterious.

[Pliosaurking]

Megalodon is still quite mysterious, as are many prehistoric sharks due to their cartilaginous skeletons not preserving.

[stargatedalek]

Still no Therizinosaurus skull comes to mind.

[Nanuqsaurus]

First thing that came to my mind was the Dunk that got shrunk recently! And from what I understand those are estimates based on related species, as we only know Dunkleosteus from the skull.

[DerbesSchuhwerk]

I recently stumbled over this genus. Genyodectes. There is not much known here, though its believed to be some sort of Ceratosaur.
I'd say, the reconstruction attempts are highly speculative in every way and there is potential for surprises, if once more material will be found and described.
https://en.wikipedia.org/wiki/Genyodectes

[Duna]

I remember me as a child being amazed by those gigantic arms! I always had thought that Deinicheirus would become the champion, the goat of carnosaurs. Turned out I love the recent version even more

That's a coincidence. I've just told (yesterday!) my 7 year old daughters all about the Deinocheirus's arms. I even showed the picture in the dinosaur encyclopaedia in of the arms (being mounted but not on display) and how much, as a 10 year old, I wondered of if the rest of the fossil would be going to be found someday. They were all thrilled to imagine how I felt in that time. In my book they just considered it to be a gigantic ornithomimosauridae, so they were right, but they never guessed the bump.