In addition to what LeoRose says about health, be aware that neither of you might get what you really love about each breed. A cross of two breeds - even a first generation 50%/50% cross - isn't going to have all qualitys of both, but rather a selection or blending of some of each, and it can be tricky to predict what that's going to look like unless you have a breeder that has a very clear goal for temperament they want to produce and has lines they've been working on for a few generations that are consistently producing that temperament.
While I don't condone breeding mixed breeds altogether, the truth is a lot of dogs being produced under fun combo names - especially rarer combinations like this one - aren't being bred ethically and in a way that prioritizes health and stable temperament in the puppies. And with dobes and danes, a stable temperament is also something that's very important, because both breeds do have anxious, nervy lines that can be difficult - or even dangerous - to live with. I knew a couple a decade or so back who had to commit an entirely bare room with only a futon in it to their rescue dane because she had such terrible separation anxiety that she'd destroy everything she had access to. The room and futon was a mess, but at least it kept her from destroying their entire house or getting into something that could hurt her. If you do go this route, go in with your eyes open and arm yourself with research about what ethical, responsible breeding looks like in both breeds - and in dogs in general - so you can spot any red flags before you're dealing with the heartbreak of a sick or highly anxious puppy.
While I don't condone breeding mixed breeds altogether, the truth is a lot of dogs being produced under fun combo names - especially rarer combinations like this one - aren't being bred ethically and in a way that prioritizes health and stable temperament in the puppies. And with dobes and danes, a stable temperament is also something that's very important, because both breeds do have anxious, nervy lines that can be difficult - or even dangerous - to live with. I knew a couple a decade or so back who had to commit an entirely bare room with only a futon in it to their rescue dane because she had such terrible separation anxiety that she'd destroy everything she had access to. The room and futon was a mess, but at least it kept her from destroying their entire house or getting into something that could hurt her. If you do go this route, go in with your eyes open and arm yourself with research about what ethical, responsible breeding looks like in both breeds - and in dogs in general - so you can spot any red flags before you're dealing with the heartbreak of a sick or highly anxious puppy.