I frequently use inline \todos (from the famous todonotes package) to embed meta comments in my documents, e.g.:
\todo[inline,caption={}]{
Some notes:
\begin{itemize}
\item \lipsum[1-2]
\item \lipsum[1-2]
\item \lipsum[1-2]
\end{itemize}
}
Which gives the following result:

My main question is: Is it possible to force full justification within a todo note?
And a side question that just came up preparing the above example: Is it possible to have page breaks in a todo note?

tcolorboxfor boxes of this size. – JBantje Mar 30 '19 at 12:40